Steam-generator.



115.730.248. PATBNTBD JUNEQ,I 190s.

` H. PRIBDBNTHAL vSTEAM GENERATOR.

APPLIUATION 'FILED Dna. z. 1901.

no nDnL.

MMR

UNITED STATES Patented June 9, 1903.

HANS FRIEDENTHAL, OF BERLIN, GERMANY.

STEAIVl-G EN ERATOR.

SPECIFICATION forming part of Letters Patent No. 730,248, dated .T une 9, 1903.

Application iiled December 2, 1901. Serial No. 84.378. (No model.)

To all whom, it 7am/y con/0.22%:

Be it known that I, I-IANs FRIEDENTHAL, a subject of the German Emperor, and a resident of Berlin, Germany, have invented a new and useful Steam-Generator, of which the following is a specification.

This invention has reference to steam-generators; and it consists, broadly, in heating water or other suitable liquid in a closed tube or vessel which is completely filled with such liquid and then permitting a small amount of such heated liquid to escape into an eX- pansion-.chamber or equivalent, in which the heated liquid will practically instantly be converted into steam or vapor by reason of the said chamber affording the necessary space for such heated liquid to expand, an equivalent amount of @Old liquid being pumped 'into the tube at the moment of such escape.

In order that my invention may be readily understood, I make referencey to the accompanying drawing, which shows in sectional side elevation my invention adapted to drive a turbine-motor which actuates the eXpansion-chamber valves and the feed-pump.

The water or other liquid is heated in a tube or tubular vessel d by the burners s or equivalent. Said vessel is kept full of liquid by a pump, the piston h of which forces liquid from a reservoir f into the lowermost part of the vessel. The pump is actuated by a crank h and has the usual valves g and o. 'When the liquid in a has been heated a sufflcientextent, the automatic operation of the valverod 0 temporarily opens a valve 7c in a passage c, connecting said vessel a with an eX- pansion-chamber c, and permits some of the liquid to escape thereinto, and on account of the high temperature of the liquid thus admitted or forced into c said liquid will instantly expand and form steam` or vapor. From the chamber c the steam or vapor is allowed to pass as valve lo closes by the concurrent and automatic opening of a valve l, xed to the same above-mentioned rod o, so as to open and close with valve la, and actuated by a crank on, into a turbine d, which, together with the shaft z', the iiy-wheelj, the cranks m n at the respective ends of said I shaft, and such other mechanism as may' be connected with said shaft, is set 1n motion into a condenser e, from which the condensed steam or water again passes into the reseri voir.

Instead of using water I may use petroleum, methylated spirit, or other inflammable liquid, in which event after the vapor has done'its work in the turbine all or a portion of it may be permittedito pass up a pipe q, having a regulating valve or cock r, so as to supply the burners s with the necessary fuel. The reservoir f is also provided with an inlet fw to enable fresh liquid to be supplied as required. When the valve lois opened, the liquid readily passes into the chamber, c, as the pressure is always considerably greater in a than in c. Care must, however, be taken that when liquid is drawn off at 7c an equal amount is forced in at g. vThis is accomplished by means of the cranks m and n, respectively, operating valve 7c and pump-piston h. Crank mis connected with valve 7c through valve Zand rod o, while crank n is link-connected with the stem of piston h. These two cranks are set reversely to each other, so that as crank m draws valve k back to open its ports crank n pushes piston 7L to force a fresh supply of iiuid into the tube at the point g.

By means of my invention it is possible to construct a steam-generator .which may be worked at very high pressures, as the vessel @may be made lof one or more tubes of comparatively small diameter, and consequently capable of withstanding very considerable pressures.

Having now described my invention, what I claim as new, and desire to secure byLetters Patent, is-

A steam-generator comprising a liquidcontaining closed vessel completely iilled with liquid, a furnace under said vessel to heat the liquid, an expansion chamber, a pipe connecting the liquid-containing vessel with said expansion-chamber, a valve in said pipe operating to intermittently open a passage whereby a portion of the heated liquid is permittedl to escape into the expansion-chamber, a pump, mechanism actuating said pump thereby. The. steam passes along a pipe p IOO concurrently with the opening' of said passage to inject a supply of liquid equivalent to that escaping through the passage, a steam-passage leading from the expansionchamber, and a Valve therein actuated to open as the rst abovena1ned Valve opens, and to close as the latter closes.

In testimony whereof I have hereunto set my hand in presence of two Witnesses.

HANS FRIEDENTHAL.

YVtnesses:

GEORG ABELsnoRFF, CARL SACKEWITZ. 

